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    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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<body>
    <script>
        function getRandomColor(flag){
            let arr=[0,1,2,3,4,5,6,7,8,9,"a","b","c","d","e","f"]
            let index='#'
            if(flag===" "||flag===true){
                for(let i=1;i<=6;i++){
                    index=index+arr[Math.floor(Math.random()*arr.length)]
                }
                return index
            }
            if(flag===false){
                let r=Math.floor(Math.random())*256
                let g=Math.floor(Math.random())*256
                let b=Math.floor(Math.random())*256
                return (`rgb(${r},${g},${b})`)
            }
        }
        console.log(getRandomColor(true))
    </script>
</body>
</html>